Bed plate for beating engines



Sept. 10, 1929. A. J. ALLISON BED PLATE FOR B EATING ENGINES Filed Aug. 6, 1925 v gnve'nfoa afl ozneq.

Patented Sept. 19, 1.929.

UNITED STATES PATEN oFFICE.

ALBERT J. ALLISON, OF DAYTON, OHIO, ASSIGNORQBY MESNE ASSIGNMENTS, TO I SIMONDS WORDEN WHITE COMPANY, A CORPORATION OF OHIO.

BED PLATE non BEATING ENGINES.

Application filed August 6,1925. Serial No.48,474.

This invention relates to improvements in the well known beating engine, or Hollander, which is extensively if not universally used in the mechanical treatment of 6 pulp for making paper. Two essential elements in a beating engine, or beater, are

a roll having a plurality of metal bars commonly called fly bars, radiating from a cylindrical body,-and a stationary bed-plate with which the fly bars cooperate as the roll rotates. The bed-plate comprises a series or group of thin fiat metal bars placed face to face, with non-metallic spacers between them,

and united by bolts passing through the bars 16 and spacers.

the bottom of a tub with the edgesof the bars upward. The beater roll shaft is mounted in adjustable bearings, so the roll can be arranged to rotate with the edges of the fly bars in the desired position with reference to the edges of the bars of the bedplate.

VVhile bed-plates of various sizes and proportions have been used, depending upon the views of designers and users of beating engines, the class of material to be treated, the quality of paper tobe made, etc., the use of heaters has always been subject to certain limitations, due to dehydration of the stock in traversing the bed-plate, and the principal object of this invention is to overcome these limitations, thereby increasing the capacity of boating engines.

Another object is to provide against burning or overheating the stock during its treatment in the beater.

Briefly stated, I accomplish these results by dividing the bed-plate into two parts or sections, between which is a channel wherein the stock accumulates after passing the first section of the'bed-plate. Here it he comes re-hydrated and prepared to traverse the second section of the bed-plate.

In describing my invention I shall refer 45 to the accompanying drawing, in which,

Fig. 1 is a plan View of my improved bedplate;

Fig. 2 is a plan view showing my invention applied to a bed-plate having elbow plates This bed-plate is secured in Fig. 3. is an end view of the preferred form of my improved bed-plate, showinga poation of the beater roll indotted lines;

' Fig. 4c is an end view of another form of my invention. a

Referring now to Figs. land 3,.it will be" seenthat my bed-plate is divided into two, parts or, sections, indicated generally by the letters A and B, between which sections there is achannel C. ,Each of the sections, A and B, consists of a series or group of metallic bars 10, between which are the usual non metallic spacers 11, and at the outsidei of eachsection thereis athicker bar 12. ;An I-bar 13 is placed between the sections A and B, with one foot resting against the innermost bar of section A and the other foot resting against the innermost bar of section B, the lower edges of the feet being flush with the lower edges of the bars. Above this I-bar there is a channel shaped member 14;, with its flanges extending upwardly, one flange lying against the innermost bar in section A and the other flange lying against the innermost bar; of section B. Bolts 15 pass through the bars 10 and 12 and spacers .11 of both sections,and between the I-bar 13 and-the channel 14, whereby all of these partsare bound securely together. The 1- bar and channel are further held in place by bolts 16 whereby they are drawn against opposite sides of the'bolts 15.

In Fig. 2 the construction is the same as in Figs. 1 and 3 except thatthe plates 10 and 12 are bent in the middle to form a very obtuse angle. The I-bars 13, channels 14: and spacers 11 are made in sections which meet. at the apexof the angle formed by the bars, the whole forming what is known as an elbow beclplate.

In Fig. 4 the sections A and B are divided by a piece of wood 17. Otherwise this struc ture is substantially the same'as the structures already described. i

The purpose of the channel C is to give the pulp a chance to cool, also to allow water to mix with the pulp. In papenmaking parlance, to become re-hydrated. In addition to what water is brought to the channel 00,

by the fly bars, water, that is, the liquid c011- tent of the tub, commonly called stufif, is enabled to flow intothe channel at each of its ends. The channel serves as a mixing chamber, in whic-hthe pulp circulates and mixes with water, so that when the pulp starts past the second section of thebed-plate it is in nearly, or quite, thesame condition with respectto water content, that it was in when it started past the first section. In the passage of the fly bars across this channel the edges of the bars collect fibers and the work done by the second section of the bed is probably as great as that done by the first section. The net result is a very considerable increase in output. At the same time the stock heats less and it is therefore in better condition when its treatment in the beater is finished, than if it had been treated with the ordinary bed-plate.

The use of the metal channel 14 is advantageous, first, because it lends support to the contiguous bars 10, and second, it eliminates sharp corners in the channel and facilitates circulation and re-hydration of stock in the channel. lie-hydration of the stock is aided by arather rapid circulation of the stuff in the channel, but the maximum of rehydration may be obtained by properproportioning of the channel. If the channel is too small the circulation is impeded; if the channel is too large the circulation will lee-sluggish and ineffectual. The proper size of the channel depends to some extent upon the speed of the roll, the quality of the stock, etc.

WVhile Ihave shown and described what at the present time I regard as thepreferred I embodiment of my invention, I donot want to be understood as limiting my invention in its 'broaderaspects to the specific structure shown.

But having illustrated my inventionand,

pointed out its purposes and advantages, 1 claim:

A bed-plate for a beating engine, comprising two groups of bars, each assembled with suitable spacers between the bars, a broad spacer between the two groups, and bolts passing transversely through the entire structure whereby to bind the whole together;

said broad spacer consisting of an I-bar placed below said bolts with its feet abutting the opposed bars, a channel member lying on the top of said bolts with its flanges extending upward, said flanges also abutting the opposed bars, and bolts traversing the bottom. of the channel and Weber" the I-bar, whereby said members are clamped to said transverse bolts.

I ALBERT J. ALLISON. 

